Oil Pres and Fuel Pres Sensors...

[Mark P.]

I have a new installation (so the engine has not been run yet) and I'm using the standard Klavico fuel and oil pressure sensors from Dynon.
My fuel pressure indicates 13.8psi and the oil pressure indicates 138psi (with the engine not running).

Shouldn't those both be zero?

I have configured the correct sensors in the Dynon EMS setup menu (and I've tried all the others ones just for 'fun'). I'm not sure why these two are not indicating zero. The sensors are properly wired and grounded.

Any thoughts? Maybe I'm missing something obvious?

UPDATE: I just did some Googling and found a document from Dynon stating that the newer sensors require a resistor to be spliced in. So now my question would be "how do I splice in a small resistor with tiny metal leads to the thick wires on the sensors??"

 

[Rhino]

What sensor settings do you have on the Sensor Input Mapping page? Are they correct for your sensors?

 

[chriscalandro]

I’m not aware of any resistor needed in line for the klavico. There are different versions and types of klavico, make sure you select the correct one.

 

[jakej]

I have a new installation (so the engine has not been run yet) and I'm using the standard Klavico fuel and oil pressure sensors from Dynon.
My fuel pressure indicates 13.8psi and the oil pressure indicates 138psi (with the engine not running).

Shouldn't those both be zero?

I have configured the correct sensors in the Dynon EMS setup menu (and I've tried all the others ones just for 'fun'). I'm not sure why these two are not indicating zero. The sensors are properly wired and grounded.

Any thoughts? Maybe I'm missing something obvious?

UPDATE: I just did some Googling and found a document from Dynon stating that the newer sensors require a resistor to be spliced in. So now my question would be "how do I splice in a small resistor with tiny metal leads to the thick wires on the sensors??"

Mark,
Your link to the Zenith page is compromised.
Which Dynon system do you have ? & which engine ?
Interesting to note the 13.8 psi & 138 psi -there's only a decimal point difference - strange.
Not all sensors go to zero when engine is shutdown - that is explained in the Dynon documentation. HTH.
Splicing resistors into wires - I use clear glue lined heat shrink for those situations & add a short length of tefzel wire (longer than the splice) & cover the lot with the heatshrink- use the heat gun & you have a more robust situation. just my .02 cents worth

 

[Mark P.]

I knew it was me! Wiring the Dynon system is pretty straight forward so I figured I must be doing something wrong. Well...I was.

I went and traced my wiring for the oil and fuel pressure sensors and I noticed I connected the red leads to ship power. That is incorrect. As I was Googling around the web, I came across this very handy chart: https://dynonavionics.com/downloads/advanced/53914 RV-14 SV EMS Wiring Diagram.pdf

I noticed that the fuel and oil pressure power was coming from the white w/red wire from the EMS (and not ship power like I had). So I disconnected them from ship power, connected them both to the white w/red wire from the Dynon and guess what? Both indications indicate "0".

I haven't run the engine yet to verify they work properly, but I'm pretty sure I now have it correct and don't anticipate any issues.

 

[chriscalandro]

I knew it was me! Wiring the Dynon system is pretty straight forward so I figured I must be doing something wrong. Well...I was.

I went and traced my wiring for the oil and fuel pressure sensors and I noticed I connected the red leads to ship power. That is incorrect. As I was Googling around the web, I came across this very handy chart: https://dynonavionics.com/downloads/advanced/53914 RV-14 SV EMS Wiring Diagram.pdf

I noticed that the fuel and oil pressure power was coming from the white w/red wire from the EMS (and not ship power like I had). So I disconnected them from ship power, connected them both to the white w/red wire from the Dynon and guess what? Both indications indicate "0".

I haven't run the engine yet to verify they work properly, but I'm pretty sure I now have it correct and don't anticipate any issues.

That will do it. 12v vs the intended 5!